#include "stm32f10x.h"
#include "stm32f10x_usart.h"
#include "stdio.h"

//使用了USART库函数

void USART_init(uint32_t bound){
	GPIO_InitTypeDef GPIO_InitStruct;
	USART_InitTypeDef USART_InitStruct;
	NVIC_InitTypeDef NVIC_InitStruct;
	
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1,ENABLE);
	
	GPIO_InitStruct.GPIO_Pin=GPIO_Pin_9;
	GPIO_InitStruct.GPIO_Mode=GPIO_Mode_AF_PP;
	GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz;
	GPIO_Init(GPIOA,&GPIO_InitStruct);
	
	GPIO_InitStruct.GPIO_Pin=GPIO_Pin_10;
	GPIO_InitStruct.GPIO_Mode=GPIO_Mode_IN_FLOATING;//浮空模式
	GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz;
	GPIO_Init(GPIOA,&GPIO_InitStruct);
	
	USART_InitStruct.USART_BaudRate=bound;	//波特率，形参
	USART_InitStruct.USART_HardwareFlowControl=USART_HardwareFlowControl_None;	//硬件控制无
	USART_InitStruct.USART_Mode=USART_Mode_Rx|USART_Mode_Tx;	//接或发模式
	USART_InitStruct.USART_Parity=USART_Parity_No;	//奇偶校验,有No无校验，Odd奇校验，Even偶校验
	USART_InitStruct.USART_StopBits=USART_StopBits_1;	//1位停止位
	USART_InitStruct.USART_WordLength=USART_WordLength_8b;	//8bit字长
	USART_Init(USART1,&USART_InitStruct);
	
	USART_Cmd(USART1,ENABLE);
	
	USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);
	
	NVIC_InitStruct.NVIC_IRQChannel=USART1_IRQn;
	NVIC_InitStruct.NVIC_IRQChannelCmd=ENABLE;
	NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority=0;
	NVIC_InitStruct.NVIC_IRQChannelSubPriority=2;
	NVIC_Init(&NVIC_InitStruct);
}
